SIST EN ISO 10426-2:2004

SLOVENSKI STANDARD
01-maj-2004
Industrija za predelavo nafte in zemeljskega plina – Cementi in materiali za
cementiranje vrtin – 2. del: Preskušanje cementov za vrtine (ISO 10426-2:2003)
Petroleum and natural gas industries - Cements and materials for well cementing - Part
2: Testing of well cements (ISO 10426-2:2003)
Erdöl- und Erdgasindustrie - Zement Bohrlochmaterialien - Teil 2: Prüfempfehlungen für
Bohrloch-Zemente (ISO 10426-2:2003)
Industries du pétrole et du gaz naturel - Ciments et matériaux pour la cimentation des
puits - Partie 2: Essais de ciments pour puits (ISO 10426-2:2003)
Ta slovenski standard je istoveten z: EN ISO 10426-2:2003
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10426-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2003
ICS 75.020; 91.100.10
English version
Petroleum and natural gas industries - Cements and materials
for well cementing - Part 2: Testing of well cements (ISO 10426-
2:2003)
Industries du pétrole et du gaz naturel - Ciments et
matériaux pour la cimentation des puits - Partie 2: Essais
de ciments pour puits (ISO 10426-2:2003)
This European Standard was approved by CEN on 1 October 2003.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10426-2:2003 E
worldwide for CEN national Members.

Foreword
This document (EN ISO 10426-2:2003) has been prepared by Technical Committee ISO/TC 67
"Materials, equipment and offshore structures for petroleum and natural gas industries" in
collaboration with Technical Committee CEN/TC 12 "Materials, equipment and offshore
structures for petroleum and natural gas industries", the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by April 2004, and conflicting national
standards shall be withdrawn at the latest by April 2004.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and
the United Kingdom.
NOTE FROM CMC  The foreword is susceptible to be amended on reception of the German
language version. The confirmed or amended foreword, and when appropriate, the normative
annex ZA for the references to international publications with their relevant European
publications will be circulated with the German version.
Endorsement notice
The text of ISO 10426-2:2003 has been approved by CEN as EN ISO 10426-2:2003 without any
modifications.
INTERNATIONAL ISO
STANDARD 10426-2
First edition
2003-10-15
Petroleum and natural gas industries —
Cements and materials for well
cementing —
Part 2:
Testing of well cements
Industries du pétrole et du gaz naturel — Ciments et matériaux pour la
cimentation des puits —
Partie 2: Essais de ciment pour puits

Reference number
ISO 10426-2:2003(E)
©
ISO 2003
ISO 10426-2:2003(E)
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ii © ISO 2003 — All rights reserved

ISO 10426-2:2003(E)
Contents Page
Foreword. vi
Introduction . vii
1 Scope. 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions. 1
3.2 Symbols . 7
4 Sampling . 8
4.1 General. 8
4.2 Sampling cement at field location. 8
4.3 Sampling cement blends at field location . 8
4.4 Sampling dry cement additives at field location . 8
4.5 Sampling liquid cement additives at field location . 8
4.6 Sampling mixing water. 8
4.7 Shipping and storage . 10
4.8 Sample preparation prior to testing . 10
4.9 Sample disposal. 10
5 Preparation of slurry. 10
5.1 General. 10
5.2 Apparatus. 10
5.3 Procedure. 12
6 Determination of slurry density. 14
6.1 Preferred apparatus . 14
6.2 Calibration. 14
6.3 Procedure. 14
6.4 Alternative apparatus and procedure . 16
7 Well-simulation compressive strength tests. 16
7.1 General. 16
7.2 Sampling . 16
7.3 Preparation of slurry. 17
7.4 Apparatus. 17
7.5 Procedure. 18
7.6 Determination of cement compressive strength at the top of long cement columns . 20
8 Non-destructive sonic testing of cement .26
8.1 General. 26
8.2 Apparatus. 26
8.3 Sampling . 26
8.4 Preparation of slurry. 26
8.5 Procedure. 26
8.6 Curing time . 26
8.7 Curing schedules . 26
8.8 Data reporting. 27
9 Well-simulation thickening-time tests . 27
9.1 General. 27
9.2 Apparatus and material . 27
9.3 Calibration. 28
9.4 Test procedure . 30
ISO 10426-2:2003(E)
9.5 Determination of test schedule.32
10 Static fluid-loss tests .38
10.1 General .38
10.2 Apparatus.38
10.3 Safety.39
10.4 Mixing procedure.39
10.5 Conditioning procedures.39
10.6 Procedures for testing at temperatures uuuu 88 °°°°C (190 °°°°F).39
10.7 Procedures for testing at temperatures >> 88 °°C (190 °°F).40
>> °° °°
10.8 Filling the static fluid-loss cell.42
10.9 Fluid loss test .43
10.10 Test completion and clean-up.43
11 Permeability tests.45
11.1 General .45
11.2 Apparatus.45
11.3 Sample preparation.46
11.4 Liquid permeability (cement permeameter).46
11.5 Alternative procedure (core permeameter) for liquid permeability.47
11.6 Calculating liquid permeability .50
11.7 Gas permeability (core permeameter).50
11.8 Calculating gas permeability.51
12 Determination of rheological properties and gel strength using a rotational viscometer .52
12.1 General .52
12.2 Apparatus.52
12.3 Calibration.54
12.4 Determination of rheological properties.54
12.5 Determination of gel strength .56
12.6 Modelling of the rheological behaviour .57
13 Calculation of pressure drop and flow regime for cement slurries in pipes and annuli .65
13.1 General .65
13.2 Newtonian fluids.67
13.3 Power Law fluids .71
13.4 Bingham Plastic fluids.77
13.5 Conversion factors.87
14 Test procedure for arctic cementing slurries.87
14.1 General .87
14.2 Preparation of cement slurry .87
14.3 Fluid fraction.87
14.4 Thickening time .87
14.5 Compressive strength .87
14.6 Freeze-thaw cycling at atmospheric pressure .88
14.7 Compressive strength cyclic testing.88
15 Well-simulation slurry stability tests.88
15.1 Introduction.88
15.2 Slurry mixing.89
15.3 Slurry conditioning.89
15.4 Free-fluid test with heated static period .89
15.5 Free-fluid test with ambient temperature static period .90
15.6 Sedimentation test .90
16 Compatibility of wellbore fluids.94
16.1 General .94
16.2 Preparation of test fluids .94
16.3 Rheology .95
16.4 Thickening time .95
16.5 Compressive strength .95
16.6 Solids suspension and static gel strength .96
iv © ISO 2003 — All rights reserved

ISO 10426-2:2003(E)
16.7 Fluid loss. 96
17 Pozzolans. 98
17.1 General. 98
17.2 Types of pozzolan . 98
17.3 Physical and chemical properties . 98
17.4 Slurry calculations . 99
17.5 Bulk volume of a blend. 100
Annex A (normative) Procedure for preparation of large slurry volumes. 102
Annex B (normative) Calibration procedures for thermocouples, temperature-measuring systems
and controllers . 104
Annex C (informative) Additional information relating to temperature determination. 106
Annex D (normative) Alternative apparatus for well thickening-time tests . 113
Annex E (informative) Cementing schedules . 116
Bibliography . 171

ISO 10426-2:2003(E)
Foreword
ISO (the International Organisation for Standardisation) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organisations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardisation.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
Draft International Standards adopted by the technical committees are circulated to the member bodies for
voting. Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10426-2 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 3, Drilling and completion fluids
and well cements.
ISO 10426 consists of the following parts, under the general title Petroleum and natural gas industries —
Cements and materials for well cementing:
 Part 1: Specification
 Part 2: Testing of well cements
 Part 3: Testing of deepwater well cement formulations
 Part 4: Preparation and testing of foamed cement slurries at atmospheric pressure
The following part is under preparation:
 Part 5: Determination of shrinkage and expansion of well cement formulations at atmospheric pressure

vi © ISO 2003 — All rights reserved

ISO 10426-2:2003(E)
Introduction
This part of ISO 10426 is based on API RP 10B, 22nd edition, December 1997, addendum 1, October 1999.
Users of this part of ISO 10426 should be aware that further or differing requirements may be needed for
individual applications. This part of ISO 10426 is not intended to inhibit a vendor from offering, or the
purchaser from accepting, alternative equipment or engineering solutions for the individual application. This
may be particularly applicable where there is innovative or developing technology. Where an alternative is
offered, the vendor should identify any variations from this part of ISO 10426 and provide details.
In this part of ISO 10426, where practical, US Customary units are included in brackets for information.
Well cement classes and grades are defined in ISO 10426-1.

INTERNATIONAL STANDARD ISO 10426-2:2003(E)

Petroleum and natural gas industries — Cements and materials
for well cementing —
Part 2:
Testing of well cements
1 Scope
This part of ISO 10426 specifies requirements and gives recommendations for the testing of cement slurries
and related materials under simulated well conditions.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 10414-1, Petroleum and natural gas industries — Field testing of drilling fluids — Part 1: Water-based
fluids
API RP 13J, Testing of heavy brines (second edition), March 1996
ASTM C 109, Standard test method for compressive strength of hydraulic cement mortars (using 2 in. or
[50 mm] cube specimens)
ASTM C 188, Standard test method for density of hydraulic cement
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
absolute volume
reciprocal of absolute density
NOTE It is expressed as volume per unit mass.
3.1.2
additive
material added to a cement slurry to modify or enhance some desired property
NOTE Common properties that are modified include: setting time (by use of retarders or accelerators), fluid loss
control, viscosity, etc.
ISO 10426-2:2003(E)
3.1.3
annulus
space surrounding the pipe in the wellbore
NOTE The outer wall of the annular space may be either surface or casing
3.1.4
assumed surface temperature
T
AS
assumed temperature at surface used for calculating a pseudo-temperature gradient
3.1.5
batch mixing
process of mixing and holding a volume of cement slurry prior to placement in the wellbore
3.1.6
Bearden units of consistency
units used to express consistency of a cement slurry when determined on a pressurized consistometer
NOTE The symbol for consistency when expressed in Bearden units is B .
c
3.1.7
blowout
point in time at which nitrogen flows through the sample in a fluid loss test
3.1.8
bulk density
mass per unit volume of a dry material containing entrained air
3.1.9
casing cementing
complete or partial annular cementing of a full casing string
3.1.10
cement
Portland cement
ground clinker generally consisting of hydraulic calcium silicates and aluminates and usually containing one or
more of the forms of calcium sulfate as an interground addition
NOTE 1 Hydraulic calcium silicates and aluminates are those which harden under water.
NOTE 2 Interground additions are added before grinding, rather than after grinding.
3.1.11
cement class
cement type
designation achieved using the ISO system of classifications of well cement in accordance with its intended
use
NOTE See ISO 10426-1 for further information.
3.1.12
cement grade
designation achieved using the ISO system for denoting the sulfate resistance of a particular cement
NOTE See ISO 10426-1 for further information.
2 © ISO 2003 — All rights reserved

ISO 10426-2:2003(E)
3.1.13
cement blend
mixture of dry cement and other dry materials
3.1.14
clinker
fused materials from the kiln in cement manufacturing that are interground with calcium sulfate to make
cement
3.1.15
compatibility
capacity to form a fluid mixture that does not undergo undesirable chemical and/or physical reactions
3.1.16
compressive strength
strength of a set cement sample measured by the force required to crush it
NOTE It is expressed as force per unit area.
3.1.17
consistometer
device used to measure the thickening time of a cement slurry under specified temperature and pressure
3.1.18
continuous-pumping squeeze-cementing operation
squeeze-cementing operation that does not involve cessation of pumping
3.1.19
equivalent sack
mass of the blend of Portland cement and fly ash or pozzolan that has the same absolute volume as 42,63 kg
(94 lbs) of Portland cement
3.1.20
filtrate
liquid that is forced out of a cement slurry during a fluid loss test
3.1.21
fly ash
powdered residue from the combustion of coal having pozzolanic properties
NOTE See Clause 17 for further description.
3.1.22
free fluid
coloured or colourless liquid which has separated from a cement slurry
3.1.23
freeze-thaw cycle
test involving a cement sample that is alternately exposed to temperatures above and below the freezing point
of water
3.1.24
hesitation-pumping squeeze-cementing operation
squeeze-cementing operation that incorporates discontinuous pumping of the cement slurry
NOTE The slurry is placed into the well, the pumps are stopped for some period of time, then a volume of slurry is
again pumped. The process is repeated until a predetermined pressure is reached or the volume of cement slurry has
been completely pumped.
ISO 10426-2:2003(E)
3.1.25
heat-up rate
R
h
rate of slurry temperature change on going from the surface temperature, T , to the predicted bottom-hole
SS
circulating temperature, T
PBHC
3.1.26
liner cementing
annular cementing operations for which the top of the casing being cemented is not at the top the wellbore
3.1.27
mud
fluid that is circulated through the wellbore during drilling or workover operations
3.1.28
mud balance
beam-type balance used to measure fluid density at atmospheric pressure
3.1.29
neat cement slurry
cement slurry consisting of only cement and water
3.1.30
pressure-down rate
R
pd
rate at which pressure is reduced from the bottom-hole pressure, p , to the pressure at the top of cement
BH
column, p , during a thickening-time test
TOC
3.1.31
permeability
measure of the capacity of a porous medium to allow flow of fluids or gases
NOTE Permeability is usually expressed in millidarcy, mD.
3.1.32
plug cementing
process of placing a volume of cement in a well to form a plug across the wellbore
3.1.33
pozzolan
siliceous or siliceous and aluminous material which in finely divided form reacts with calcium hydroxide to form
a cementitious material
NOTE See Clause 17 for further description.
3.1.34
preflush, noun
fluid containing no insoluble weighting agents used to separate drilling fluids and cementing slurries
3.1.35
pressure vessel
vessel in a consistometer into which the slurry container is placed for the thickening-time test
3.1.36
pressurized curing vessel
vessel used for curing a sample of cement under temperature and pressure for compressive strength testing
4 © ISO 2003 — All rights reserved

ISO 10426-2:2003(E)
3.1.37
pressure-up rate
R
pu
rate at which pressure is increased from the starting pressure to the bottom-hole pressure during a thickening-
time test
3.1.38
relative density
specific gravity
ratio of the mass of a substance to the mass of an equal volume of a standard substance at a reference
temperature
NOTE The standard substance is usually water; the reference temperature is usually 4 °C.
3.1.39
sedimentation
separation and settling of solids in a cement slurry
3.1.40
slurry container
container in a pressurized consistometer used to hold the slurry for conditioning purposes or for thickening-
time test
3.1.41
sonic strength
extent of strength development of a cement sample calculated by measuring the velocity of sound through it
NOTE The calculation is based on specific mathematical correlations and not on direct measurements of strength.
3.1.42
starting pressure
p
S
initial pressure applied to the test sample at the beginning of the thickening-time test
NOTE p is also used to determine the pressure-up rate.
S
3.1.43
spacer
fluid containing insoluble weighting materials that is used to separate drilling fluids and cementing slurries
3.1.44
squeeze-cementing
remedial process in which cementing material is forced under pressure into a specific portion of the well such
as a fracture or opening
3.1.45
static fluid loss test
test to determine fluid lost from a cement slurry when placed against a 325 mesh screen at 6 900 kPa
(1 000 psi) differential pressure
3.1.46
static stability test
test to determine the degree of sedimentation and free fluid development in a cement slurry
3.1.47
stirred fluid-loss cell
cell specially designed to allow for conditioning of the cement slurry within the same cell used to perform a
static fluid loss test
ISO 10426-2:2003(E)
3.1.48
strength retrogression
reduction in compressive strength and increase in permeability of a cement caused by exposure to
temperatures exceeding 110 °C (230 °F)
3.1.49
thickening time
time required for a cement slurry to develop a selected Bearden consistency value
NOTE The results of a thickening-time test provide an indication of the length of time a cement slurry can remain
pumpable under the test conditions.
3.1.50
weigh batch mixer
scale tank
device or system for the weighing and blending of cement with dry additives
3.1.51
well simulation test
test whose parameters are designed and modified as required to simulate the conditions found in a wellbore
6 © ISO 2003 — All rights reserved

ISO 10426-2:2003(E)
3.2 Symbols
For the purposes of this part of ISO 10426, the symbols given in Table 1 apply. This list is non-exhaustive.
Table 1 — Symbols
Symbol Meaning
h top-of-cement true vertical depth
TOCTVD
b
p bottom-hole pressure
BH
p starting pressure
S
p top-of-cement pressure
TO
C
T assumed surface temperature
A
S
a
T bottom-hole circulating temperature
BHC
T bottom-hole static temperature
BHS
T predicted bottom-hole circulating temperature
PBHC
T maximum recorded bottom-hole temperature after a static
MRBHS
period
T minimum recorded bottom-hole temperature after sufficient
MNRBHC
circulation in the well to obtain a stabilized or steady-state
temperature
T predicted squeeze temperature
PS
c
∇ pseudo-temperature gradient
PT
T pseudo-undisturbed temperature
PU
T recorded squeeze temperature
RS
T slurry surface temperature
SS
T top-of-cement circulating temperature
TOCC
T top-of-cement static temperature
TOCS
T top-of-cement column temperature
TOC
T undisturbed formation temperature
UF
t time to displace the leading edge of the cement slurry from
a
bottom of the casing to the top of the annular cement column
t time to displace the leading edge of cement slurry to the
d
bottom of the wellbore or other predetermined location in the
well
a The T can vary with time, fluid being circulated, pump rate, pipe size, etc.
BHC
b Hydrostatic pressure at the bottom of the well, calculated from the true vertical depth and the fluid
densities in the wellbore.
c Gradient in °C/100 m (°F/100 ft), calculated from the difference between the maximum recorded bottom-
hole static temperature (T ) and the T .
MRBHS AS
ISO 10426-2:2003(E)
4 Sampling
4.1 General
For cement blends, the purpose for which samples are taken shall be considered. In many cases, samples of
the cement, cement blend, solid and liquid additives, and mixing water may be required to test a slurry in
accordance with this part of ISO 10426. The best available sampling technology shall be employed to ensure
accurate samples are taken. Some commonly used sampling techniques are described in this clause.
NOTE API documents prior to API RP10B, 22nd Edition, December 1997 have dealt only with sampling unblended
cement in accordance with the procedure outlined in ASTM C 183.
4.2 Sampling cement at field location
When sampling from bulk tanks, transport containers or sacks, the cement shall be dry and uniform. Multiple
samples shall be extracted using a suitable device (Figure 1). A composite of the samples shall be prepared,
packaged and labelled (see 4.7). Average sample volume shall be 8 l to 20 l. Suggested sampling procedures
are also outlined in ASTM C 183.
4.3 Sampling cement blends at field location
Cement blends may be sampled from the weigh batch mixer (scale tank), bulk transport or extracted from the
flow lines during transfer. The cement and dry additives shall be thoroughly blended prior to sampling. This
can be done by transferring the cement (air blowing) from the weigh batch mixer to some other container three
to six times. Samples from the bulk container may be extracted in accordance with 4.2. Samples extracted
from a flow line during a transfer may be taken from a properly installed sample valve, diverted flow sampler
or automatic in-line sampling device (Figure 1). The samples shall be prepared, packaged, and labelled (4.7).
Sample volume shall be sufficient to perform the desired testing.
4.4 Sampling dry cement additives at field location
Dry cement additive samples may be extracted from a bulk container or sack. The additive shall be dry and
uniform prior to sampling. Multiple samples shall be extracted from the centre of the source using a suitable
sampling device (Figure 1). A composite of the samples from the same lot shall be prepared, packaged and
labelled (4.7). The volume of each dry cement additive sample shall be sufficient to perform the desired
testing.
4.5 Sampling liquid cement additives at field location
Most liquid additives are solutions or suspensions of dry materials. Prolonged storage can cause separation of
the active ingredients. Thus, the active ingredients may float to the top of the container, be suspended as a
phase layer, or settle to the bottom. For these reasons, liquid additives shall be thoroughly mixed prior to
sampling. The sample shall then be extracted from the centre of the container using a clean, dry sampling
device. A composite of the samples from the same lot shall be prepared, packaged and labelled (4.7). The
volume of each liquid additive sample shall be sufficient to perform the desired testing.
4.6 Sampling mixing water
The mixing water shall be sampled from the source. The sample shall be extracted in such a way as to avoid
contamination. The sample shall be packaged and labelled (4.7). The sample volume shall be sufficient to
perform the desired testing.
8 © ISO 2003 — All rights reserved

ISO 10426-2:2003(E)
Dimensions in millimetres
a) Tube sampler for sacked cement b) Tube sampler for bulk cement

c) Automatic probe sampler d) Modified diverted-flow sampler

e) Top view – Lateral sampler
Key
1 hardwood handle
2 Dragg tubing
3 sample tube extended
4 product discharge
5 2,54 cm (1 in) ball valve
6 flow direction
7 2,54 cm (1 in) ball valve
a
Approximate volume = 320 ml
Figure 1 — Commonly used sampling devices
ISO 10426-2:2003(E)
4.7 Shipping and storage
Test samples shall be packaged promptly in clean, airtight, moisture-proof containers suitable for shipping and
long-term storage. The containers shall be lined metal, plastic, or some other heavy-walled flexible or rigid
material to assure maximum protection. Re-sealable plastic bags may be used provided the bag is placed in a
protective container prior to shipping to prevent puncturing, and to contain all material that may leak out during
shipping. Ordinary cloth sacks, cans or jars shall not be used. Shipping in glass containers is not
recommended.
Each slurry container shall be clearly labelled and identified with the type of material, lot number, source, and
date of sampling. Shipping containers shall also be labelled. The lids of containers shall not be marked, since
the lids can be readily interchanged and thus lead to confusion. Any required regulatory identification or
documentation shall be enclosed or securely attached to the container. All hazardous material samples shall
be packaged and labelled in accordance with all regulatory requirements.
4.8 Sample preparation prior to testing
Upon arrival at the testing location the samples shall be closely examined to ensure they have remained
sealed during shipment and are not contaminated. Each sample shall be thoroughly blended just prior to slurry
preparation. (Clause 5)
For storage, each sample shall be transferred into a suitable, leak-proof container (if one has not been used in
shipping), properly labelled and dated, and stored in a dry place where room temperatures remain fairly
constant. At the time of testing, each sample shall be examined for quality and thoroughly blended just prior to
slurry preparation.
Optimum shelf life(s) for all samples shall be determined by the supplier or manufacturer. If unknown, use of
any cement additive that has been stored for longer tha
...